Answers edited by Hriman

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• Given #sin theta=4/5#, #theta# lies in Quadrant 2, find #cos theta/2# ?
  
• How do you write 24 thousand in scientific notation?
  
• Is 8x-2y=2 direct variation, inverse, or neither?
  
• A 2.0 liter bottle can withstand a pressure of 5.0 atm. 120 mL of liquid ethanol, #"C"_2"H"_5"OH"#, (density 0.789 g/mL), is poured into the bottle and sealed. The bottle is heated to 100 C, changing all the liquid to gas. Will the bottle explode?
  
• How can I solve this?
  
• Can someone please help me with Equilibrium?
  
• Mcq When zinc poweder is added to acetic acid ? A.the mixture becomes warm B.a gas is evolved C.the colour of mixture becomes yellow D.a solid settles at the bottom
  
• Calculate? the volume occupied by 8.8 gram of CO2 at 31.1 degree Celsius and 1 bar pressure R= 0.083 by LK inverse mole inverse( molecular mass of CO2=44 gram mole inverse)
  
• How do you solve sin(x)+cos(x)=-1?
  
• After a hot shower and dishwashing, there is "no hot water" left in the 50-gal (185 L) water heater. This suggests that the tank has emptied and refilled with water at roughly 10°C a) how much energy needed to reheat the water to 50°C?
  
• Calculate the change in the number of moles of each gas from the start of a reaction until reaching equilibrium?
  
• What is the set of numbers to which #8/3# belong?
  
• Use a calculator to solve the equation on the interval [0, 2π). (see picture for more info). Thanks a lot!?!
  
• 1/(cos(2*y)-cos(y)^2) How can I simplify this?:(
  
• What is the balanced equation for sulphuric acid in copper oxide?
  
• Can object have a varying speed if its velocity is constant? Can it have varying velocity if its speed is constant? If yes, give examples in each case.
  
• How do you prove? #[cos(pi/2-x)-2cos(pi/2-x)sin^2x+cos(pi/2-x)sin^4x]sec^5(-x) = tanx#
  
• How would you rewrite sin(x-pi/3)?
  
• A ball with a mass of #1 kg # and velocity of #7 m/s# collides with a second ball with a mass of #6 kg# and velocity of #- 4 m/s#. If #40%# of the kinetic energy is lost, what are the final velocities of the balls?
  
• How do you balance this redox reaction?
  
• Predict the products in the neutralization reaction of hydrogen iodide, HI, with calcium hydroxide, Ca(OH)2. Write a balanced equation. Identify and explain the parts of the reaction?
  
• What are the adverbs? The Bully Busters graciously invited BMS students to run the track with them in order to promote their cause.
  
• Write expression as an algebraic expression or a trigonometric function?
  
• Question #6a568
  
• An ideal gas at #"155 kPa"# and #25^@ "C"# has an initial volume of #"1 L"#. The pressure of the ideal gas increases to #"605 kPa"# as the temperature is raised to #125^@ "C"#. What is the new volume?
  
• The general solution of the equation 2sin x+1=0 is?
  
• What is sec^x -1 simplified?
  
• Cot B + cos B divided by sec B - cos B = csc B + 1 divided by tan^2 B can it be verified?
  
• 4/5-(-2/3)=?
  
• How do you write y=(x-3)^2+5 ?
  
• What element has the highest first ionization energy?
  
• What is the equation of the line passes through (2,3) and (-2,1)?
  
• Drawing the reference triangles for trig and inverse trig functions?
  
• What is the value of the horizontal asymptote? Describe it's meaning in the context of the problem.
  
• How do you factor #x^3-8x^2+16x#?
  
• How can I simplify this trigonometry expression? Thanks!
  
• What is the volume of a 0.50 mole of gas at STP if it behaves ideally?
  
• Can an object be increasing in speed but decreasing in acceleration? An example please.
  
• How do you solve the inverse trig function #cos^-1 (-sqrt2/2)#?
  
• A trench is evidence of which kind of plate boundary? Question 40 options: 1) Divergent 2) Convergent 3) Transform 4) Uniform
  
• Cot B / sec B - tan B - cos B / sec B + tan B = sin B + csc B ?
  
• Prove the following identities?
  
• Stoichiometry - 37.8 grams of Aluminum are available for reaction with excess oxygen. Calculate the mass of the aluminum oxide that is produced?
  
• Solve the equation over the interval [0,2pi)?
  
• How do you solve #25^x=1/125# ?
  
• How do I find the quotient #(-5+i)/(-7+i)#?
  
• For the reaction 2 A + B ---> Products, the following initial rate data was collected? [A] [B] Initial Rate 0.01 M 0.01 M 0.002 M/sec 0.03 M 0.02 M 0.0024 M/sec 0.03 M 0.01 M 0.006 M/sec
  
• Some very hot rocks have a temperature of #320 ^o C# and a specific heat of #240 J/(Kg*K)#. The rocks are bathed in #16 L# of water at #70 ^oC#. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?
  
• How can I solve this?
  
• How do you write the reciprocal number of 4/9?
  
• A triangle has sides A, B, and C. Sides A and B have lengths of 2 and 5, respectively. The angle between A and C is #(11pi)/24# and the angle between B and C is # (7pi)/24#. What is the area of the triangle?
  
• How do I solve the following attached problem?
  
• A sample of nitrogen gas at a pressure of 3 atm inside a rigid, metal container at 20.0 °C is placed inside an oven whose temperature is 50.0 °C. What is the pressure of the nitrogen after its temperature is increased? Answer atm
  
• How could the sun die?
  
• How many moles of solute particles are in 1L of 0.50M glucose? Type the number?
  
• What is #cot^4theta/(1-cos^4theta)# in terms of non-exponential trigonometric functions?
  
• If I have a glass of filled with 300 grams of water at 25 *C then how much ice do I need to add for it to reach a temperature of 5 *C?
  
• Find the geometric structure of: Na₂O PCl₃ H₂S P. S Need an explanation,possibly with electronic configuration (Teacher requires this) ?
  
• How do I solve this law of sines question? 16(sin x) = (sin 110)9
  
• How do I do this?
  
• Sarah is 25 years older than her son Gavin. In ten years, Sarah will be twice Gavin age. How old are Sarah and Gavin?
  
• Difference between WORK and ENERGY ?
  
• Find an Inverse Variation equation that models the data?
  
• Zn(s) + 2AgNO3 ---> 2Ag (s) + Zn(NO3)2 When an excess of Zn reacts with 25.00 g of AgNO3, (1.43x10^1) grams of silver are produced. What is the percent yield?
  
• 3 consecutive even integers add up to -6, what are they?
  
• 540g of ice at 0°C is mixed with 540g of water at 80°C. The final temperature of the mixture is..???
  
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